I agree. The best thing one can do is exercise. Stretching,resistance training,something aerobic(walking,running,cycling,hiking). This all helps with cardio vascular,PD symptoms , cognative function and it just makes me feel better. Also seems to make meds work better and require less meds. There is alot of research going on in this area right now.
An excerise program can have an immediate impact on your quality of life.
Like Todd I do something ever day. Just makes me feel better in general.
If you start a program start slow and build on it.